A WordPress plugin to demonstrate the use case for Custom Post Types in WordPress.
You should download it (Clone or old school download) and put it in wp-content/plugins/wbs-custom-post-type-demo Then activate it.
After the installation and activation, you need to go to settings > permalinks in order to update the .htaccess file. WordPress calls this "flush rewrite rules". Just visit this site, that's it. WP will do it in the background.